I think I miss something because when the window is smaller than 800 the #header is still hidden so I think I need to add an ‘else’ condition or something.
And also how can I add a bunch of css code only when the windows is bigger than 800 or it’s better to use css media queries ?
Thanks

I know it’s better with media queries but the problem is that I want to display the #header only when a button is clicked only when the browser width is greater than 800px because I do not want to alter the css properties for mobile devices

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